Molding flask or box.



No. 820,591. PATENTED MAY l5, 1906. D. MGLAIN.

MOLDING FLASK 0R BOX.

APPLICATION FILED AUG.1'7. 1900.

FL Z 17:1

` |||l 6 I "lllllllmlllul' y@ J7 -Cl @771;

UNITED STATES PATENT OFFICE.

TO NIELS ANTON CHRISTENSEN,

OF MILWAUKEE, WISCONSIN.

NIOLDING- FLASK OR BQX.

Speccation of Letters Patent'.

PatentedMay 15, 1,906.

1900. Serial No. 27,1717.

Application filed August 1'7,

To all whom, it may concern:

Beit known that I, DAVID MCLAIN, a resident of Milwaukee, in the county of Milwaukee and State ofWisconsin, have invented certain new and useful Improvements in Molding Flasks or Boxes, of which the following is a specification.

My invention pertains to molding flasks or boxes; and the object thereof is to improve the construction of such flasks, making them, preferably, of structural iron-work, such as I- beams or channel-bars, and also provide for interchangeability of the boxes.

My invention also contemplates a novel and advantageous clamp for the flasks.

In the drawings, Figure l is a plan view of one of my boxes or flasks; Figs. 2 and 3, sections on lines 2 2 and 8 3, respectively, of Fig. 1; Fig. 4, a section on line 4 4 of Fig. 2; Fig. 5, an elevation of the clamp g Fig. 6, a section on line 6 6 of Fig. 5, and Fig. 7 a fragmentary view of a modified form.

Each flask or box may be made of structural iron, preferably of channel-bars, forming the sides l, 2, 3, and 4, which are secured together in any suitable way-as, for instance, by the angle-pieces 5, riveted in the corners. The resulting flask is a solid frame of great strength and durability and capable of being clamped and arranged with respect to each other, as hereinafter described. Suitable handles 6 are provided on any two of the sides-as, for instance, on the sides 2 and 4.

The flanges 7 and 8 on the sides l and 3 of each frame or flask are provided with holes 9, which are drilled in a jig in order that any set of flasks may be interchangeable in this respect. These holes are thus arranged so as to extend through both the top and bottom flanges exactly opposite each other, and pins l0 are now provided ,which slip into the sets of holes.

The pins 10 are preferably about, say, one sixty-fourth of an inch less in diameter than the holes, so as to be removed `from the flask readily. To prevent the dropping out of the pins, small wooden wedges ll may be inserted in the space between the web of the channel-bar and the pins. The upper end of the pin is slightly beveled or rounded off, so as to make it easier for the upper portion or section of the flask to enter when closing the mold.

The flask being constructed so as to have the outer lateral flanges, the means above desuggest scribed are readily provided, so that the flasks may be fitted accurately upon each other at every closing of the mold, so that an absolutely accurate. casting is obtained.

It will be seen that in havin the flasks built on the planv above described it is possible and practical to have not only a two-part flask, but as many more as required by the peculiar make of the pattern from which a casting is.l to be made, all of the forms being similarly constructed and interchangeable. Consequently while I have shown and described` herein a two-part flask it is to be understood that I do not limit myself thereto, but contemplate a flask comprising a plurality of sections or parts of any required num- The peculiar construction of flask wherein two flanges are brought face to face, as shown in Figs. 2 and 3, permits of the use of the novel clamp shown in Figs. 5 and 6, the same consisting of a metal disk 12, having a segmental side opening 13, communicating with These clamps' a central circular opening. are adapted to be driven onto any two meeting flanges, and any desired number of them may be used on the sides of the flask. These clamps may be as readily removed as they are applied.

From the foregoing description it is apparent that a simple, efficient, and durable flask is provided having a simple provision for interchangeability and the centering of sections of a completed flask. A simple form of clamp is also provided, by the use of which the usual long clamps spanning the whole depth of both the upper and lower part of the flask are dispensed with.

By reason of the opposite inclining of the projections or flanges in the present instance and the use of the disks having segmental openings to engage the projections of the meeting or adjacent flasks I avoid the employment of separate small wedges, inasmuch as the disks themselves constitute combined clamps and wedges.

Although I have described more or less precise forms and details of construction, I do not intend to be understood as limiting myself thereto, as I contemplate changes in form, the proportion of parts, and the substitution of equivalents as circumstances may or render expedient and without departing from the spirit of my invention.

It is perfectly obvious that a single flask or boX may be used in connection with my clamp, and in Fig. 7 I have illustrated how it may be done. The bottom of the flask is formed bya plate 14, and the clamp 15 serves to hold the flask and plate together, just as clamp 12 held two adjoining flanges together. The only difference between the clamps 15 and the other clamps is that while one side 16 of the opening is angular, as before, to conform to the flange th'efother side 17 is straight to conform to the plate. In this manner the boX is formed as readily as two flasks are joined together. Whiley each boX may have two members, in one case such members are the two flasks, while in the modified form they are the single flask and bottom plate.

When the bottom plate is used as shown in Fig. 7, it becomes the equivalent of a flask so far as the clamping means are concerned, and it is to be so understood when the claims speak of two flasks being clamped together.H

claim- 1. Molding-flasks each consisting of a frame whose sides are formed of channel-bars with their flanges outermost and provided with registering holes in their flanges, and pins entering the holes of the flanges of the lowermost flask and projecting above the upper flange to receive the lower or meeting flange of a similar su erimposed flask.

2. A molding-flas consisting of a frame formed of channel-bars with their flanges outermost and provided with registering holes in such flanges, pins entering the holes of the flanges of the lowermost flask and proj ecting above the upper flange to receive the lower or meeting flange of a similar and superimposed flask, and means for holding the pins in place.

3. Molding-flasks each consisting of a frame whose sides have top and bottom outwardly-extending flanges provided with registering holes and straight pins supported from below and entering the holes in both of the flanges of the lowermost flask and proj ecting above the top flange thereof, and also entering the hole of the meeting or lower flange of a superimposed flask, as such latter flask is placed in position, the upper end of the pins being tapered, and means for holding the pins in place.

DAVID MoLAIN. Witnesses:

A. E. BALDWIN, JOHN DADMUN. 

